Hi,
> What should I do?
It's very simple to understand: it works with PHP 7.4.13 and it doesn't work with PHP 8.0.0, so that means that one or more plugins or extensions of WordPress are not compatible with PHP 8 and that's it. So, we stay with PHP 7.4.13 until the extensions and plugins have been updated to PHP 8.0.0.
I don't understand this insistence on always wanting to use the latest versions without first worrying about compatibility with the CMS and web applications we use.
Or rather, I do understand, as Henry de Montherlant wrote more than sixty years ago, it is one of the forms of snobbery.
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